The properties of a compound can often be predicted from the properties of its constituent elements, however, they're not always the same due to changes that occur during chemical reactions.
Yes, you can often predict the properties of a compound by knowing the properties of the elements that make it up. This is a fundamental concept in chemistry. For instance, sodium is a very reactive metal and chlorine is a poisonous gas, but when they combine to form sodium chloride, the resulting compound is ordinary table salt, which is safe to consume. However, it's important to note that while the properties of a compound are related to the properties of its constituent elements, they are not always the same. This is due to the changes that occur during the chemical reaction process, in which bonds are formed or broken and electrons are shared, gained, or lost.
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B.) release digestive enzymes.
C.) release secretions directly into the blood.
D.) usually have ducts.
Answer:
Explanation:
The scientist, J. J Thomson interpreted the deflection of the rays by electrically charged plates and magnets as evidence of “bodies much smaller than atoms” (electrons) that he calculated as having a very large value for the charge-to-mass ratio. That is, The masses of their bodies (electrons) was much smaller than the atoms but they had a very large charge to mass ratio.
He then proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model.